arnold



4 Sheets-Sheet 1. S. ARNOLD.

SEWING MAGHINB.

(No Model.)

(No Model.)

' 4 Shveets-Sheet 2. S. ARNOLD.

SEWING MACHINE.

Q d l azz;

Nv PETERS. PllaIn-Lllmgmphcr. Washngiorl D. C.

4 Sheets-Sheet 3.

S. ARNOLD.

SEWING MACHINE.

(No Model.)

No. 331,107. Patented NOV. 24, 1885.

N. PETERS, PnnlwLilhugrwher. waahinglon, D. C.

(No Model.) 4 sheets-sheet 4.

S. ARNOLD.

SEWING MACHINE.

No. 331,107. y Patented NOV. 24, 18%85.

NITED STATES irrita.

SATTERLEE ARNOLD, OF BROOKLYN, NEV YORK, ASSIGNOR TO ANNA M.

y ARNOLD, OF SAME PLAGE.

SEWING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 331,107, dated November24, 1885.

' Application filed May 14, 1884. sel-iai No. 131,488. (No model.)

To all whom it may concern:

Be it known that I, SATTERLEE ARNOLD, a citizen ofthe United States,residing at Brooklyn, in the county of Kings and State of New York, haveinvented certain new and useful Improvements in Sewing-Machines, ofWhich the following is a specification, reference being had therein tothe accompanying drawings.

The object of my invention is to provide a stitch-forming mechanismcapable of efficient operation at high rates of speed with comparativelylittle friction.

In the accompanying drawings, Figure 1 is a sectional side elevation ofa sewing-machine l embodying my invention. Fig. 2 is a skeleton view ofthe needle and looper mechanisms, the latter being somewhat modified.Fig. 3 is a plan view, the bracket-arm being in section on line x,Fig. 1. In this figure the covering-plates are removed from the lowerarm of the machine and the looper mechanism is the same as is shown inFig. 2. Figs. 4t and 5 are detail diagrams illustrating the formation ofthe stitch. Figs. 6 and 7 are detail perspective views of loopers andthe end of the looper-rods to which they are attached. Fig. 8 is abottom plan view of the cloth-plate and the shuttle-holder attachedthereto. Figs. 9, 10, and 11 are detail views of the looperrod.

My invention in the form herein illustrated is embodied in a machineadapted for sewing tubular articles, said machine in all its detailsbeing described in my application No. 131,487, Oase A, filedsimultaneously herewith.

In this machine the bed or work plate A is made in the form of an arm orhorn for the reception of the stitchforming mechanism co-operating withthe needle. Formed integral with or suitably secured to the rear end ofthe work-plate is the bracket arm B, made somewhat longer than usual,and supporting at its forward end the needle and presser bars. Journaledin bearings in the rear portion of the bracket-arm B is thedriving-shaft C, having at its upper end fast and loose pulleys. On saidshaft adjacent to said pulleys is an eccentric, 4, connected by apitman, 5, with a primary needle-operating lever, E, pivoted on a stud,E2, secured to the bracket-arm B. The

forward end of the lever E is connected by a link, 6, with a secondaryneedle-operating lever, F, pivoted on a stud, F2, supported by thebracket-arm. The lever F is connected by a link, 7, with van arm, 8,secured to a needle-bar, 9, said needle-bar carrying at its lower endthe usual eye-pointed needle. A take-up lever, I, is pivoted on the studFwhich serves as a fulcrum for the lever F. The lever E is provided atits forward end with a plate, 17, which is preferably slotted, so thatit may be adjustably connected with said lever. Plate 17 is joined by alink, 18, with the short arm 19 of the take-up lever I. By adjusting theplate 17 on the lever E it is obvious that the movement of the take-uplever I may be properly timed. To the take-up lever I is secured a lightsupplementary spring take-up, 20, the upward movement of which islimited by a loop, 2l, attached to the lever I. Eyes 22 and 23 for thepassage of the thread are provided at the outer ends of the take-uplever I and supplementary take-up 21. The needle-th read passes from thespool 24, around the tensionbar G, of ordinary construction, throughguideeyes 25 and 26 on the forward end of the arm B. From the guide-eye26 the thread is carried upward through the eye 22 in the end of thetake-up lever I, then to the eye 23 in the vend of the supplementarytake-up, whence it passes downward to the needle.

To the lower end of the vertical drivingshaft O is secured a crank-disk,68, carryinga crank-pin, connected by a link, 69, with a similarcrank-pin on an arm, 70, attached to the upper end of asecondaryvertical shaft, 71. Shaft 71 is journaled to the arm B in a differentvertical plane from that of the drivingshaft C, so that the axes ofthese two shafts are out of line. By this arrangement and connection ofthese two shafts a differential rotary movement will be imparted to theshaft 7l from the driving-shaft O. In other words, while these twoshafts will rotate coincidently, or will both perform a singlerevolution in the saine time, the shaft 71 will move much more rapidlyduring one portion of its revolution than it will during the otherportion.

To the lower end of the shaft 71 is attached a crank, 72, connectedJwith a looper rod or ICO lever, 73, guided by a swiveled fulcrum, 74,and having at its forward end a looping-hook, 86. The fulcrum 74 mayconsist of a spherical bearing-piece, through which the looperrod isadapted to the slide, as shown in Figs. 2 and 3, or it may'con'sist of apivoted block .embraced by guiding-ribs on the looper-rod', as shown inFigs. l and 11. Thel looper-rod 73 may be formed in two pieces,adjustably secured together, so that said rod may be lengthened orshortened, as maybe necessary to bring the looper in proper positionrelative to the vneedle and shuttle. The swiveled fulcrum 74 is locatedconsiderably forward of the center of the looper-rod, so that the looperon the front end of said rod will be caused to travel in an ellipticalpath which is somewhat` more 'flattened at one end than at the other, as

indicated in Fig. 3. The shuttle 7 is stationary and is looselysupported 'in a holder 77, preferably attached to the under side of thecloth-plate 2, which latter is removably secured to the forward endofthe work-support ing arm or plate A. rlhe shuttle is thus 'arranged inthe interior of the forward end of the arm or horn yon which the work issup- Y ported. vThe shuttle-thread is carried by a disk-bobbin ofordinary construction loosely supported in the shuttle.

` Instead of makingthe looper-rod in two pieces, adjustably securedtogether, as above referred to, adjustment of said rod to compenf satefor wear and to bring the looper in proper operative relation to theneedle-may be secured by the construction shown in detail in Figs. 9 andl0, in which the rear end of the looper-rod 73is shown as being formedwith j an internally-threaded sleeve, 80,'having at its upper side anopening to admit the ball-headed 'crank-pin 8l on the crank-arm 72KScrews 82 are ttedto the threaded sleeve 80, said screws being providedon their inner end with cups vor concaverecesses adjacent to the head ofthe crank-pin 8l, which is thus embraced by said screws.

itwiu be Obvious that by adjust-.ing the screws 82 the working length ofthe' rod 73,`

orin other words, the distance between the crank-pin 8l and the hook orlooper 75 on the forward end of the said rod, may be increasedor'diminished, and thus the hook may be adjusted to the needle with theutmost nicety, and any wear on the crank-pin 81 and itsernbracing-screws will be by the same adjust-k ment readily compensatedfor.

To prevent any accidental displacement of base or shank, by which it isattached to the looper-rod, said shank being cut away to vform adiminished neck, which supports the pointed or sharp-edged -hook proper,75. This hook 86 extends horizontally from the neck outside ofthelatter, and is wedge or chisel shaped, its outer `face beingstraight, or nearly so, and its inner face beveled. At the base of thehook proper, on its inner or beveled face, is formed a groove forretaining the needlethread after it has been seized by the hook. As thesaid hook extends slightly outward beyond the neck by which vit issupported, said neck, when lthe machine is in operation, will be withinthe vertical plane in which the needle moves, while the point of thehook will just graze or lightly touch the needle in seiz lng the loopsof needle-thread.

The operation of my machine is as follows: Motion being given to thedrivingeshaft, the eccentric 4 thereon, through the connectingrod 5,primary and secondary levers E and F, and links 6 and 7, imparts avertical reciprocating movement to the needle-bar. Inv the presentinstance the relative arrangement and connection of the levers E and Fare such that the well-known double-reciprocating or dip7 movement willbe given to said needle-bar and needle, the upward movement for thesecond descent being very small. This dip movement, however, is notessential, as in the construction lshown thel'ooper or hook 75 seizesthe'l'oop of needle-thread on the rst descent of the needle; but'it isessential that the needle lbefore it makes its final l ascent shouldpause va suficientlength'of time to enable the lop'rv or hook to carrythe loop of needle'- thread around the point of the shuttle, and to dothis before the needle 'risesthe said looper or hook must move withgreat rapidity'after it has caught the loop'of needle-thread.

The looper or hook 75 is operated by means of its connections with theshaft 71, which, as before explained, has a dierential movement, therapid portion of its revolution commencing when the said looper or hookis about to Vcatch the loop of needle-thread, and continuing while it iscarrying said loop around the point of the stationary shuttle 7 6,afterwhich time the'slower movement of the shaft occurs, causing the looperto slacken its speed to enable the takeup to draw the thread entirelyaround the shuttle and its interlocking thread and to tighten and thuscomplete the stitch. The rapidmovement of the looper or hook whenpassing the needle insures the engagement of said hook with thedeveloped loop of needle'- thread. Thus the operation continues, thestitches being repeated indefinitely while the machine runs.

As soon as the loop of needle-thread has been carried around the pointof the shuttle by the looper or hook 75, and has become dis'- engag'edfrom the said looper or hook as the latter backs or travels away fromsaid loop, thel supplementary spring take-up 20,' which has been drawndown by the rapid expansion ICO IIO

of the loop, suddenly reacts and pulls the thread quickly around theshuttle and out of the Way of the advancing looper before the maintake-up I rises to complete the stitch. The supplementary take-up 20also serves to keep the thread from slackening during the rst part ofthe descent of the needle-bar, thus holding` the thread out of the wayof the point of the needle. rIhe upward movement of the supplementarytake-up is limited by the loop 2l, as before explained.

I do not wish to claim, broadly, in this application theneedle-operating mechanism hereinbefore described, as said mechanism isembraced by my application No. 131,487, Case A, filed simultaneouslyherewith.

Having thus described my invention,I claim as new and desire to secureby Letters Patent- 1. Ina sewing-machine, the combination ofadriving-shaft, a secondary shaft having its axis in adifferent planefrom that of the driving shaft and connected with thelatter,and thusderiving a variable rotary motion from the uniformly-rotatingdriving-shaft, a stationary shuttle, a hook or looper for carrying theneedle-thread around said shuttle, and a looper-rod for imparting anirregular or varible rotary movement to said hook or looper from saidsecondary shaft, substantially as set forth.

2. In asewing-machine, the combination of a stationary shuttle, a hookor looper for carrying the needle-thread around said shuttle, atake-upfor tightening the stitches, a supplementary spring take-up for drawingthe thread quickly out of the way of the advancing hook or looper whensaid thread is released therefrom, a device, as loop 2l, connected withthe main take-up forlimiting the upward movement of the said springtake-up, and mechanism for operating said hook or looper and take-up,substantially as set forth.

3. In a sewing-machine, the combination of a work-plate constructed inthe form of` an arm or horn, a stationary shuttle arranged in theforward part of said arm or horn, alooperrod extending longitudinally ofsaid arm or horn, and having at its forward end a hook or looper, andmechanism for imparting a rotary movement to the forward end of saidlooper-rod, substantially as set forth.

4. In a sewing-machine, the combination of a work-plate, a stationaryhorizontal shuttle supported by said work-plate, a verticallypivotedlooper-rod the forward end of which is adapted to work beneath saidshuttle, a hook or looper attached to the forward end of said looper-rodand projecting above the latter, and mechanism for operating saidlooper-rod, substantially as set forth.

5. In a sewing-machine, the combination, with a needle-bar and itsoperating mechanism, of a stationary shuttle and a looper-rod carrying ahook or looper, and having a variable or differential rotary movement atits forward end, whereby the said hook or looper is enabled to moverapidly to carry the loop of needle-thread over the point of theshuttle, and then move slowly while the stitch is being completed,substantially as set forth.

6. In a sewing-machine, the combination, with the looper-rod and itsoperating mechanism, of a hook or looper having a vertical shank theupper portion of which is cut away to form a diminished neck, to whichlatter is attached a wedge-shaped horizontal hook, having its outer sideslightly beyond or outside of said shank, and being provided at its baseon its inner or beveled face with a threadretaining groove,substantially as set forth.

7. In a sewing-machine, the combination of a looper-rod having at itsrear end an internally-threaded sleeve and at its forward end a hook orlooper, a ball-headed crank-pin projecting within said sleeve, and twoadjustingscrews fitting said sleeve, and having concave recesses ontheir inner ends adjacent to the head of said crank-pin, substantiallyas set forth.

8. In asewing-machine, the combination of a looper-rod having at itsrear end an internally-threaded sleeve, which is split at one side andformed with ears, set-screws tapped in said ears, a hook or looper atthe forward end of said rod, a ball-headed crank-pin proj ecting withinsaid sleeve, and two adjustingscrews fitting said sleeve and havingconcave recesses on their inner ends adjacent to the head of saidcrank-pin, substantially as set forth.

9. In a sewing-machine, the combination, with a needle-bar and itsoperating mechanism, of a stationary device, as a shuttle, for holdingthe lower thread, a pivoted looperrod having a variable or differentialrotary movement at its forward end, and provided with aho'ok or looperfor carrying the needlethread partly around said stationary device, anda take-up timed to tighten each stitch while the looper-rod and looperare performing the slower part of their movement, substantially as setforth.

In testimony whereof I affix my signature in presence of two witnesses.

SATTERLEE ARNOLD.

Vitn esses:

HENRY CALVER, ALBERT II. Nonnis.

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